1 files changed, 10 insertions, 3 deletions

diff --git a/include/asm-arm/arch-at91/at91_dbgu.h b/include/asm-arm/arch-at91/at91_dbgu.h
index b0369e176f7b..8019ffd0ad3b 100644
--- a/include/asm-arm/arch-at91/at91_dbgu.h
+++ b/include/asm-arm/arch-at91/at91_dbgu.h
@@ -16,6 +16,7 @@
 #ifndef AT91_DBGU_H
 #define AT91_DBGU_H
 
+#ifdef AT91_DBGU
 #define AT91_DBGU_CR            (AT91_DBGU + 0x00)      /* Control Register */
 #define AT91_DBGU_MR            (AT91_DBGU + 0x04)      /* Mode Register */
 #define AT91_DBGU_IER           (AT91_DBGU + 0x08)      /* Interrupt Enable Register */
@@ -30,6 +31,15 @@
 
 #define AT91_DBGU_CIDR          (AT91_DBGU + 0x40)      /* Chip ID Register */
 #define AT91_DBGU_EXID          (AT91_DBGU + 0x44)      /* Chip ID Extension Register */
+#define AT91_DBGU_FNR           (AT91_DBGU + 0x48)      /* Force NTRST Register [SAM9 only] */
+#define         AT91_DBGU_FNTRST        (1 << 0)                /* Force NTRST */
+
+#endif /* AT91_DBGU */
+
+/*
+ * Some AT91 parts that don't have full DEBUG units still support the ID
+ * and extensions register.
+ */
 #define         AT91_CIDR_VERSION       (0x1f << 0)             /* Version of the Device */
 #define         AT91_CIDR_EPROC         (7    << 5)             /* Embedded Processor */
 #define         AT91_CIDR_NVPSIZ        (0xf  << 8)             /* Nonvolatile Program Memory Size */
@@ -53,7 +63,4 @@
 #define         AT91_CIDR_NVPTYP        (7    << 28)            /* Nonvolatile Program Memory Type */
 #define         AT91_CIDR_EXT           (1    << 31)            /* Extension Flag */
 
-#define AT91_DBGU_FNR           (AT91_DBGU + 0x48)      /* Force NTRST Register [SAM9 only] */
-#define         AT91_DBGU_FNTRST        (1 << 0)                /* Force NTRST */
-
 #endif